CN116771436A - TRT top pressure subsection control method based on stationary blade opening change - Google Patents
TRT top pressure subsection control method based on stationary blade opening change Download PDFInfo
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- CN116771436A CN116771436A CN202310753516.2A CN202310753516A CN116771436A CN 116771436 A CN116771436 A CN 116771436A CN 202310753516 A CN202310753516 A CN 202310753516A CN 116771436 A CN116771436 A CN 116771436A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009825 accumulation Methods 0.000 claims abstract description 44
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 5
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 claims description 3
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/006—Automatically controlling the process
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
Abstract
The invention relates to the technical field of energy and power engineering, in particular to a TRT top pressure sectional control method based on stationary blade opening change, which is characterized in that after the function of controlling the top pressure of a blast furnace by a pressure reducing valve group exits, the top pressure of the blast furnace is controlled by a TRT turbine unit, and the specific control steps are as follows: 1) Authorizing a blast furnace, and starting a program; 2) A top pressure deviation calculator assigns values; 3) Comparing the dead zone parameters, and executing the program downwards; 4) Presetting two groups of segment control parameters; 5) A first-level accumulation calculator assigns values; 6) A second-level accumulation calculator assigns values; 7) Setting stationary blade parameters; 8) And (3) executing control, wherein the stator blade opening controller drives the TRT stator blade to act, so as to complete the control of the blast furnace top pressure. The invention has the advantages that: the design period of the blast furnace TRT top pressure control program is greatly shortened, the debugging steps of engineering technicians are simplified, precious debugging time is saved, the same set of programs can be used among TRT units of different blast furnaces, and the control function can be easily and simply transplanted.
Description
Technical Field
The invention relates to the technical field of energy and power engineering, in particular to a TRT jacking sectional control method based on stationary blade opening change.
Background
The TRT is a blast furnace gas residual pressure power generation device, high-temperature and high-pressure gas is acted by a turbine, and the turbine drives a generator to generate power. The blast furnace controls the blast furnace top pressure through the pressure reducing valve group and the TRT together, the pressure reducing valve group executes a control function when the TRT is stopped, and the TRT is switched to the TRT to control the blast furnace top pressure when in full-load operation.
The PID is a conventional TRT method for controlling the top pressure of the blast furnace, and can meet most of the top pressure control requirements of the blast furnace, but for a large-sized blast furnace with strong disturbance, the conventional PID control cannot meet the requirement of top pressure fluctuation.
At present, various unconventional PID control modes in China have the defects of complex general algorithm, long debugging time and low practicality and portability.
Disclosure of Invention
The invention aims to provide a TRT jacking sectional control method based on stationary blade opening change, which overcomes the defects of the prior art, is applied to PID control of a blast furnace, and solves the problems of complex algorithm, long debugging time and low practicality and portability in the related art.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the TRT top pressure sectional control method based on the stationary blade opening change is characterized in that after the function of controlling the top pressure of the blast furnace by the pressure reducing valve group exits, the top pressure of the blast furnace is controlled by the TRT turbine unit, and the method comprises the following specific control steps: 1) A blast furnace is authorized, and when a TRTPLC control system receives a blast furnace permission top pressure signal from a blast furnace main control room, a program is started; 2) The top pressure deviation calculator assigns a value, subtracts a top pressure measured value from a top pressure preset value, adds a signal deviation correction factor, and sends a calculation result to the top pressure deviation calculator; 3) Comparing the dead zone parameters, taking an absolute value by a top pressure deviation calculator, comparing and calculating with the dead zone parameters, wherein the difference is larger than zero, and executing the program downwards; 4) Presetting two groups of segment control parameters, wherein one group is 7 positive numbers corresponding to 1 Kpa-7 Kpa respectively, and the other group is 7 negative numbers corresponding to-1 Kpa-7 Kpa respectively; 5) The primary accumulation calculator assigns a value, and a preset sectional control parameter value is taken and sent to the primary accumulation calculator; 6) The second-stage accumulation calculator assigns a value, adds the TRT stationary blade opening value to the first-stage accumulation calculator, and sends the calculation result to the second-stage accumulation calculator; 7) Setting a stator blade parameter, presetting a stator blade minimum limit parameter, and when the secondary accumulation calculator is larger than the value of the stator blade minimum limit parameter, assigning a stator blade opening controller by the secondary accumulation calculator; 8) And (3) executing control, wherein the stator blade opening controller drives the TRT stator blade to act, so as to complete the control of the blast furnace top pressure.
Preferably, the dead zone parameter defaults to 0.1Kpa.
Preferably, when the value of the top pressure deviation calculator is positive, the value of the top pressure deviation calculator is between 0Kpa and 1Kpa, the value of the preset segmentation control parameter 1Kpa is taken to be sent to a first-stage accumulation calculator; when the value is more than 1Kpa and 2Kpa, the value of the preset segmentation control parameter 2Kpa is taken and sent to a primary accumulation calculator; when the value is more than 2 Kpa-3 Kpa, taking the value of the preset segment control parameter 3Kpa and sending the value to a primary accumulation calculator; the values of 4Kpa, 5Kpa, 6Kpa and 7Kpa are sent to a first-stage accumulation calculator.
Preferably, when the value of the top pressure deviation calculator is a negative number, the value of the top pressure deviation calculator is between 0Kpa and-1 Kpa, and the value of a preset segment control parameter-1 Kpa is taken and sent to a first-stage accumulation calculator; when the value is between-1 Kpa and-2 Kpa, taking the value of the preset segment control parameter-2 Kpa and sending the value to a first-stage accumulation calculator; when the value is between-2 Kpa and-3 Kpa, taking the value of the preset segment control parameter-3 Kpa and sending the value to a first-stage accumulation calculator; the values of-4 Kpa, -5Kpa, -6Kpa and-7 Kpa are sent to a first-stage accumulation calculator.
Preferably, the segment control parameters are preset, and the first group is 1, 2, 3, 4, 5, 6 and 7; the second group is-1, -2, -3, -4, -5, -8, -15.
Preferably, the minimum limit parameter value of the stator blade is 36%.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a technician only needs to input the sectional control parameters, namely, the opening change values of the two groups of 14 static blades from 1Kpa to 7Kpa and from-1 Kpa according to the debugging result, so that the control function requirement of the top pressure of the blast furnace TRT can be easily completed, the design period of the control program of the top pressure of the blast furnace TRT is greatly shortened, the debugging steps of engineering technicians are simplified, precious debugging time is saved, the same group of programs can be used among TRT groups of different blast furnaces, and the transplanting of the control function becomes easy, simple and practical.
Drawings
FIG. 1 is a control flow diagram of an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
The components of the embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Fig. 1 is a schematic control flow diagram of a TRT top pressure sectional control method based on a stator blade opening change, which is used for controlling a top pressure of a blast furnace by a TRT turbine unit after a function of controlling the top pressure of the blast furnace by a pressure reducing valve is exited, and specifically comprises the following control steps:
1) The TRTPLC control system receives a blast furnace permission top pressure signal sent by a blast furnace main control room, the pressure reducing valve group controls the function of the blast furnace top pressure to exit, and the TRT turbine group is used for controlling the blast furnace top pressure;
2) Subtracting the measured value of the top pressure from the preset value of the top pressure, adding a signal deviation correction factor, and sending a calculation result to a top pressure deviation calculator;
3) Presetting a dead zone parameter, wherein the default value is 0.1Kpa, the absolute value is taken by a top pressure deviation calculator, the absolute value is compared with the dead zone parameter, the value is larger than zero, and the program is executed downwards.
4) Presetting two groups of sectional control parameters, wherein one group is 7 positive numbers corresponding to 1 Kpa-7 Kpa respectively, the other group is 7 negative numbers corresponding to-1 Kpa to-7 Kpa respectively, and the first group of preset values of a blast furnace No. 5 TRT is 1, 2, 3, 4, 5, 6 and 7; the second group is-1, -2, -3, -4, -5, -8, -15;
5) When the value of the top pressure deviation calculator is a positive number and is between 0Kpa and 1Kpa, taking the value of the preset segmentation control parameter 1Kpa and sending the value to a primary accumulation calculator; when the value is between 1Kpa and 2Kpa, the value of the preset segmentation control parameter 2Kpa is taken and sent to a primary accumulation calculator; when the value is between 2Kpa and 3Kpa, the value of the preset segment control parameter 3Kpa is taken and sent to a primary accumulation calculator; the values of 4Kpa, 5Kpa, 6Kpa and 7Kpa are sent to a first-stage accumulation calculator;
when the value of the top pressure deviation calculator is a negative number and is between 0Kpa and-1 Kpa, taking the value of a preset segment control parameter-1 Kpa and sending the value to a primary accumulation calculator; when the value is between-1 Kpa and-2 Kpa, taking the value of the preset segment control parameter-2 Kpa and sending the value to a first-stage accumulation calculator; when the value is between-2 Kpa and-3 Kpa, taking the value of the preset segment control parameter-3 Kpa and sending the value to a first-stage accumulation calculator; the values of-4 Kpa, -5Kpa, -6Kpa and-7 Kpa are sent to a first-stage accumulation calculator;
6) Adding the TRT stationary blade opening value with a primary accumulation calculator, and sending the calculation result into a secondary accumulation calculator;
7) Presetting a minimum limit parameter of a static blade, wherein the default value is 36%, and when the secondary accumulation calculator is larger than the minimum limit parameter, assigning a static blade opening controller by the secondary accumulation calculator;
8) The vane opening controller drives the TRT vanes to act.
In the examples, the blast furnace has a furnace volume of 2580m 3 Annual output is 243.5 ten thousand tons, fuel ratio is 510 kg/ton, and process energy consumption is 370 kg/ton. The matched TRT model GT200.W.D is in the form of dry and wet dual-purpose, the inlet pressure is 210kPa, the outlet pressure is 12kPa, and the flow is 55 ten thousand Nm 3 And/h, rated power 20070KW.
The invention mainly focuses on the minimum limit of the static blade and the magnitude of two groups of 14 parameter values in the value shifting process. And for the corresponding decrease of the parameter value of the opening overshoot and for the corresponding increase of the parameter value of the stationary blade tracking lag, repeating the test until a proper value is found.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The TRT top pressure sectional control method based on the stator blade opening change is characterized in that after the function of controlling the top pressure of a blast furnace by a pressure reducing valve group exits, the top pressure of the blast furnace is controlled by a TRT turbine unit, and the method comprises the following specific control steps:
1) A blast furnace is authorized, and when a TRTPLC control system receives a blast furnace permission top pressure signal from a blast furnace main control room, a program is started;
2) The top pressure deviation calculator assigns a value, subtracts a top pressure measured value from a top pressure preset value, adds a signal deviation correction factor, and sends a calculation result to the top pressure deviation calculator;
3) Comparing the dead zone parameters, taking an absolute value by a top pressure deviation calculator, comparing and calculating with the dead zone parameters, wherein the difference is larger than zero, and executing the program downwards;
4) Presetting two groups of segment control parameters, wherein one group is 7 positive numbers corresponding to 1 Kpa-7 Kpa respectively, and the other group is 7 negative numbers corresponding to-1 Kpa-7 Kpa respectively;
5) The primary accumulation calculator assigns a value, and a preset sectional control parameter value is taken and sent to the primary accumulation calculator;
6) The second-stage accumulation calculator assigns a value, adds the TRT stationary blade opening value to the first-stage accumulation calculator, and sends the calculation result to the second-stage accumulation calculator;
7) Setting a stator blade parameter, presetting a stator blade minimum limit parameter, and when the secondary accumulation calculator is larger than the value of the stator blade minimum limit parameter, assigning a stator blade opening controller by the secondary accumulation calculator;
8) And (3) executing control, wherein the stator blade opening controller drives the TRT stator blade to act, so as to complete the control of the blast furnace top pressure.
2. The TRT roof pressure section control method based on a vane opening variation according to claim 1, wherein the dead zone parameter default value is 0.1Kpa.
3. The TRT jacking section control method based on the variation of the opening degree of the stator blade according to claim 1, wherein in the step 5), when the value of the jacking deviation calculator is positive, the value of the jacking deviation calculator is between 0Kpa and 1Kpa, and the value of the preset section control parameter 1Kpa is sent to the first-stage accumulation calculator; when the value is more than 1Kpa and 2Kpa, the value of the preset segmentation control parameter 2Kpa is taken and sent to a primary accumulation calculator; when the value is more than 2 Kpa-3 Kpa, taking the value of the preset segment control parameter 3Kpa and sending the value to a primary accumulation calculator; the values of 4Kpa, 5Kpa, 6Kpa and 7Kpa are sent to a first-stage accumulation calculator.
4. The TRT jacking section control method based on the variation of the opening degree of the stator blade according to claim 1, wherein in the step 5), when the value of the jacking deviation calculator is negative, the value of the jacking deviation calculator is between 0Kpa and-1 Kpa, and the value of the preset section control parameter-1 Kpa is taken to be sent to the first-stage accumulation calculator; when the value is between-1 Kpa and-2 Kpa, taking the value of the preset segment control parameter-2 Kpa and sending the value to a first-stage accumulation calculator; when the value is between-2 Kpa and-3 Kpa, taking the value of the preset segment control parameter-3 Kpa and sending the value to a first-stage accumulation calculator; the values of-4 Kpa, -5Kpa, -6Kpa and-7 Kpa are sent to a first-stage accumulation calculator.
5. The TRT roof pressure sectional control method based on a vane opening variation according to claim 1, wherein the sectional control parameters are preset, and the first group is 1, 2, 3, 4, 5, 6, 7; the second group is-1, -2, -3, -4, -5, -8, -15.
6. The TRT head pressure section control method based on a vane opening variation according to claim 1, wherein the vane minimum limit parameter value is 36%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310753516.2A CN116771436A (en) | 2023-06-26 | 2023-06-26 | TRT top pressure subsection control method based on stationary blade opening change |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310753516.2A CN116771436A (en) | 2023-06-26 | 2023-06-26 | TRT top pressure subsection control method based on stationary blade opening change |
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| CN116771436A true CN116771436A (en) | 2023-09-19 |
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| CN202310753516.2A Pending CN116771436A (en) | 2023-06-26 | 2023-06-26 | TRT top pressure subsection control method based on stationary blade opening change |
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- 2023-06-26 CN CN202310753516.2A patent/CN116771436A/en active Pending
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